The Development of Automatic Speech Recognition Software for Portable Devices

In this paper, we show some the implementation issues of automatic speech recognition (ASR) for portable devices. First, we propose free-running speech recognition software which does not need to push the button before saying voice command and is always running for detecting key-words under real environment. Second, we propose a method for detecting keyword and rejecting out-of-vocabularies (OOV). It consists of filler-modeling technique and utterance verification. And finally, we implement the ASR software on PDAs (Samsung SPH-M4300 and HP iPAQ-RW6100), one kind of portable devices. It works in 54.7% of real-time with the recognition accuracy of 88.3%.